Quote:
Originally Posted by Capricorn
Interesting Info. As far as I know I still have many epubs2 in my calibre database. Would it then be better to convert all of them to epub3 in order to be "future-proof"? Or can I simply leave them as is?
And how do I find all the epub2 books in my calibre database?
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It would be better to leave them as is. You are not future-proofing by arbitrarily converting ePub2 to ePub3.
Only convert those ePub2 where you want to use ePub3 feature(s).